U2112 Diagnostic Trouble Code

U2112 is a kind of OBD-II Diagnostic U-Network Diagnostic Trouble Code.

It is considered generic because it applies to all makes and models of vehicles, although specific repair steps may be different depending on your car model.

Symptoms

Symptoms of a U2112 diagnostic trouble code may include:

Diminished fuel efficiency
Fuel pressure too high
Malfunction Indicator Lamp (MIL) illuminated
Engine surge

Possible Causes :

Rusty exhaust systems, cracked exhaust manifolds or damaged or missing gaskets or donuts will cause air leaks.
An air leak forward of the DPF will change the sensor readings resulting in the code
Faulty IMRC actuator/sensor

Repair Processes :

Once located, visually inspect the connectors and wiring. Look for rubbing, scraping, bare wires, worn spots or melted plastic connectors. Look for damage to the tank indicating impact that may have damaged the fuel pump or sender.

Process Tips

Diagnostic trouble code U2112 is not difficult to diagnose and repair. Thus, it always pays to have a qualified technician to look after your vehicle should this error code arise.

Diagnosing this code requires the engine to be in good running shape, without unmetered air entering the engine. If other codes that relates to misfiring condition, lean running or air entering the engine is present, then you must first fix those error codes before U2112.

Fortunately, U2112 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

U2112 Trouble Code For Specific Cars

U2112 Honda Vamos Reverse Mirror Output Circuit Short to Ground
U2112 Fiat 2 Lack Of HO2S22 Switch - Sensor Indicates Lean
U2112 Fiat 519 Lamp Backup Switch Input Circuit Short To Ground
U2112 Talbot 110 Mirror Passenger Down Circuit Open
U2112 Light Car Company Rocket Throttle Pedal Position Sensor/Switch A Circuit Malfunction
U2112 Ferrari Pinin Key Off Voltage High
U2112 Mercedes-benz Sprinter Air Suspension Gate Solenoid Output Circuit Failure